Games like The Story Adam Left Behind
Games like The Story Adam Left Behind include Suzerain, Undertale, Minds Beneath Us, Legend of Mortal, and Far Away. We matched them by the tags players give The Story Adam Left Behind on Steam (RPG, Choose Your Own Adventure, Visual Novel, 2D, and Alternate History): closest matches first, and among equally close ones the better-known games.

Suzerain
Shared: Choose Your Own Adventure · Visual Novel · Choices Matter

Undertale
Shared: RPG · Choices Matter · Multiple Endings

Minds Beneath Us
Shared: Visual Novel · Choose Your Own Adventure · Choices Matter

Legend of Mortal
Shared: RPG · Choices Matter · Multiple Endings

Far Away
Shared: Visual Novel · Choices Matter · Choose Your Own Adventure

The Henry Stickmin Collection
Shared: Choose Your Own Adventure · Multiple Endings · Choices Matter

The Life and Suffering of Sir Brante
Shared: RPG · Choose Your Own Adventure · Choices Matter

Volcano Princess
Shared: RPG · Choices Matter · Multiple Endings

The Test
Shared: Choose Your Own Adventure · Multiple Endings · Visual Novel

Sovereign Tower
Shared: Visual Novel · Choose Your Own Adventure · Choices Matter

Love Is All Around
Shared: Visual Novel · Multiple Endings · Choices Matter

Aliya: Timelink
Shared: RPG · Visual Novel · Multiple Endings

The Test: Hypothesis Rising
Shared: Visual Novel · Choose Your Own Adventure · Choices Matter

The Life and Suffering of Sir Brante — Chapter 1&2
Shared: Choose Your Own Adventure · Visual Novel · RPG

The Test: Final Revelation
Shared: Choose Your Own Adventure · Visual Novel · Choices Matter

I Was a Teenage Exocolonist
Shared: RPG · Choices Matter · Visual Novel

Emily is Away <3
Shared: Choices Matter · Multiple Endings · Visual Novel

Hero's Adventure: Road to Passion
Shared: RPG · Multiple Endings · Choose Your Own Adventure

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Choose Your Own Adventure · Choices Matter

The Wolf Among Us
Shared: Choose Your Own Adventure · Visual Novel · Choices Matter

Love Curse: Find Your Soulmate
Shared: Visual Novel · Choices Matter · RPG

Road to Empress I
Shared: RPG · Choices Matter · Visual Novel

BAD END THEATER
Shared: Visual Novel · Multiple Endings · Choose Your Own Adventure

LoveChoice
Shared: Visual Novel · Choices Matter · Multiple Endings